Headstock for lathes



Patented Sept. 5

2 SHEETS-SHEET I.

P. STONER.

HEADSTOCK FOR LATHES. APPLlcAnoN FILED Nov/1a, 1920. 1,428,190.

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P. STONER. HEADSTOCK FOR LATHES. APPLICATION men Nov. xmlszo.

Patendsept. 5,11922.

Patented Sept. 5, 1922.

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l HnAnsTooK FOR itn'irrns,v

Application filed November`18,g1-920; Serial 1\T; 424,903.'

My invention relates to a-headstoclrfor.

lathes. The Vmain object of said invention is to provide a work center that can be made stationary or revolv-able at the willl'of the operator.

Another object is topositively lock the work center against rotation while permit-` ting rotation of the facev plate.

Referring to the` accompanying drawings which are made a part hereof and on which similar reference characters indicate similar parts, f v

Figure l isa longitudinal section through the head stockshowing the parts in position when the' work center is stationary; Figure 2, a similar viewvwheny the work center is free torevolvewith the face plate; Figure 3, a section on the line 3 3 of l Figure l Figure 4, a section on the line 4-4 of Figure2;and l' Figure 5, a detail viewfof the end of thel spindle bearing.

In the drawings, the character A represents :the headstock in `which is securely mounted the vspind/lefbearing B bored and tapered to form a bearing surface forthe main spindle 10. This spindle is in turn threaded at its extreme end for the receptionof a screw collar 11 slotted on one side i kas at 12 in 'Figure 4 and adapted to receive a screw 12" for securely locking it to theA spindle 10. The yspindle 10 is provided with a tapered bore 13 adapted to receive a work center 14 of the usual construction.' The spindle` bearing B vis reversely tapered on its outer surface a's at '15 to receive a bearing sleeve 16 upon which is shrunken1 the lpulley 17 which has a face plate 18 fastened by screws 18 to its outer fa'ce* and is provided with a central aperture 12 through which projects the work center 14.

Threaded into an aperture 2O inthe collar 11 is a machine screw 21 provided with a smooth cylindrical end 22 adapted to enter a slot 23 in the spindle bearing` B when it is desired to have the work center stationary ordead and. adapted.. to have/its slotted' end engage a smooth bore 24 in the. flange of theface plate 18'When it is desired' to have the., work center revolvable `:or liveJ As a means of adjlustingthepulley to take up. thelwearA on the-bearing, a col-lar 251s provided l which is mounted onV two ortmore pins`26 inserted'into. openings 275m the hub y of' the pulley 17. Alsolmountedf'"ontthese pins andbetween the collar 25 and hub of 6 thepulley is aseriesof relatively thin collars or washers28.whichvmay be, removed one. at atime to perm-it thepulley and itsl attached sleeve 16.1to.` be .imovedtul along the tapered portion ofA thebearingld by `.rotat-i ing collar 11,is'o as to compensate for-wear between'fsl'eeveat land bearingB.y w

The'. headstock A., is lprovided `with a 7 threaded opening At through which a screwdriver may be insertedfor.-the1purpose of' changing the position.'ofthey screw. 211. fA screw plu-g elosesthe .opening Awhen the.latterisfnotfinuse.:Y i y. :k v

In; the device described,the face plate uis always active, but by merely ,removingv the work spindle may be renderedffeither'fref.-

801 screwplug A'and; adjustingscrew 21, the

volvableg;Y orstationary at'. thef-fwillofI the'.v i

operator." v

While I have describedlmyinvention with reference tothe headstock cfa lathe,-I do not limit myself tov such use, andthe specific terms used are intendedfor description andnot'for limitation.'` I may also vary the structural details shovynlanddescribedhere in the-appended' claims. A. v

Having thu'slfullyl described my invention, what I claim as new anddesiretosecure by Letters Patent, is:

1. In combination a workiholding center, a spindle therefor, a stationary bearing? hav-A ing an inner bearing surface inrcontact with`` the spindle.,y a" rotary device concentric withI the spindle fand means located forwardly of 1100 said bearing` surface'fo'r connecting the spin-:`

dief to eithersaid stationary` bearingfor. vsaid i rotary dev-ice, substantially las lset forth;l 2. In combination, a work-holding center,

a stationary deviceand a rotary device concentric therewith, and a unitary' device radially movable for connecting the center alternately to either of said devices.

3. In combination, a work center, a spindle therefor, a stationary, device and a rotary 90A in, within the scope of the-v' invention defined v connected to either the rotary or the stationl ary device.

1l. ln combination, a. worlr center, aflanged member rigidly connected with the center, a screw plug extending through the flange of said member and means adapted to engage with opposite ends of the screw-plug to render the center rotary or stationary, substantially as set forth. e

In a headstock for lathes, a work-holding center, a collar fast thereto having a flange, a stationary bearing sleeve and a rotary face-plate each having a ange, said three flanges having apertures adapted to be aligned, and a screw-plug adapted to engage the intermediate flange and either of the others, substatially as set forth.

6. In a headstoclr for lathes, a casing hav?` ing an aperture, a work-holding center,a collar 4fast thereto having a flange, a stationary bearing sleeve and a face-plate each .y having a flange, said three flanges having apertures adapted to be aligned. with each other and the aperture in the casing, and a screw-plug adapted to pass ythrough the aperture in the casing and enfrage the intermediate flange and'either of the others, substantially as set forth.

7. Ina stock for a lathe, a center, a spindle therefor, a stationary spindle bearing, a pulley loosely mounted on the bearing, a face plate on thepulley, the'spindle bearing and face-plate having openings and means rigidlyconnected to the center and adapted to engage either one of said openings.

8. In a stock for a lathe, a center, a sleeve having an inner bear 'surface and an outer b-earingV surface, a spindle for the center located in said sleeve,- a driving pulley located on the outer bearing surface of the sleeve, and means toconnect the spindle to either the sleeve or the pulley.

9. In aheadstoek for lathes,.a center, a spindle therefor, a collar adjustable on the spindle, a loose pulley for driving the spin- `dle and means adapted to loclr the collar to the pulley to drive the spindle. l0. A` pulley having a fixed abutment adapted to contact therewith at one end, an adjustable abutment in contact therewith at the other and wear compensating means between the lpulley and the fixed abutment,

'substantially as set forth.

y11. A pulley having a fixed abutment adapted to'contact therewith at one end, an

Lesa-leo mljustable abutment in Contact therewith at the other end and a series of washers between the pulley and the xed abutment, substantially as set forth.

l2. ln a wear compensating device, a tapered bea-ring, an internally-tapered pulley thereon, an adjustable abutment adapted to move the pulley to compensate for wear between its inner surface and the bearing, a fixed abutment at the other end of the pulley, and washers between the pulley and the fixed abutment, substantially as set forth.

ln a headstock for lathes, a centen bearing spindle, a pulley, a sleeve having bearing surfaces for engagement by the pulley and the spindle, the contacting faces of the pulley `and sleeve being tapered, and means carried by the spindle for moving the pulley to compensate for wear between it and the sleeve, substantially as set forth.

ll. In a headstock for a lathe, a center, a spindle therefor, a pulley, a fixed abutment at one end of the pulley, washers between the pulley and said abutment, a collar threaded on the spindleand bearing against the other end of the pulley and means to lock the col` lar to the spindle, substantially as set forth.

15. A headstock of Athe class described comprising a casing, a stationary spindle therein having bearing surfaces inside andoutside, a pulley running on its outer bearing surface, a face plate secured to said pul ley, a spindle mounted to revolve within said bearing and carry a work-holding center, a

collar screwed on the end of said spindle and adapted to engage the side of said pulley and means for securing the face plate to said collar or said collar to said bearing, substantially as set forth.

i6. The, combination of a fixed spindle bearing, a pulley journaled on the outer surface thereof, said spindle bearing having a notch at one end, a face platesecured to said pulley, a radial opening in said face plate, a spindle within saidbearing, a collar adjustably mounted on said spindle and a screw carriedby said collar adapted to lock said collar to said face plate to impart motion to said spindle or engage said notch to hold the spindle stationary, substantially as set forth. ln witness whereof, I have hereunto set my hand and seal at lNashington, District of Columbia this thirteenth day of November, A. D. nineteen hundred and twenty.

PAUL STONER.

Witnesses: i i

E. M. BRADFORD, F. W. DAHN. 

